I made a test run on this recipe before company came for Christmas. It was good, but I wasn't as big a fan of that much Swiss cheese. So for Christmas I used 3/4 cup Swiss and 2 1/2 cups cheddar cheese and added green pepper for extra flavor. Everyone raved about it! It was sooo good. One thing I also did differently the second time is fry the bacon in strips and then crumble. The first time the pieces wouldn't fry completely and were stacked on top of each other, so they turned out half crisp, half soggy. It worked much better to cook them in strips and then fry the onion in a little bit of the grease afterwords.